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Better stay up late to buy from e-tailer Woot. The site posts only
one item per day. When the limited supply is gone, you're out
of luck until a new item is posted at midnight.

"If someone is looking at something, a 24-hour period is
more than enough time to consider whether or not to buy it,"
says Matt Rutledge, 33, founder and CEO of the Carrollton, Texas,
company, which features everything from electronics to toys to
accessories. The limited availability and discounted prices make
most of these items impulse buys, he says.

Glazer says that setting a specific time frame for an offer or
making it available only to a certain number of customers adds a
sense of urgency. Limited-time price promotions and
gift-with-purchase offers, which can be tied to a holiday or a
special event, are usually most successful, he says.

"You can also limit your promotion to a [certain] number of
hours," Glazer adds. "We've seen department stores do
[early-morning] 'door-busters.' These very short promotions
can get people lining up at the store before it opens. That
momentum carries on through the rest of the day."